Tao-yang displays wrong font in minibuffer prompt

[cireu]

I try to use Tao-yang theme in Emacs 27.0 in Windows 10 1803. and I use the moon branch of Spacemacs configuration and I set the "mononoki" as my favourite font.

By loading themes manually, I add some code to the user-init function

    (add-to-list 'load-path "~/.emacs.d/tao-theme")
    (add-to-list 'custom-theme-load-path "~/.emacs.d/tao-theme")
    (load-theme 'tao-yang t)

Tao-yang shows correctly almost everywhere but the minibuffer prompt of ivy/smex, its font will automatically fallback to the default font of system.

But if I use the Tao theme, the font can be displayed properly

And I also try Tao-yin and it doesn't work again! Do you have some ideas about it?
Is it a bug of Emacs 27 or Spacemacs moon or my configurations?
Thanks for your awesome themes!

[cireu]

I found that if start emacs from a dump file, it will be properly displayed. Maybe it just a bug of Emacs 27

[11111000000]

@cireu ok, reopen if you sure

[komikat]

@cireu its because you haven't set a fixed pitch font, (set-face-attribute 'fixed-pitch nil :family "Iosevka" ), solved it for me.